Bibliographical note

This work has been supported by the Danish Strategic Research Council(2104-07-0022) and EUDP (j.no. 64009-0050). Partial financial supportwas also received from the European Commission as part of theFramework 7 ICT 2009 collaborative project HIFLEX (grant no. 248678),partial financial support from the EU-Indian framework of the ‘‘Largecells’’project that received funding from the European Commission’s SeventhFramework Programme (FP7/2007–2013. grant no. 261936), partialfinancial support was also received from the European Commission aspart of the Framework 7 ICT 2009 collaborative project ROTROT (grantno. 288565) and from PVERA-NET (project acronym POLYSTAR).